# Commodity Interaction Analysis: Demographics and Resource Rents

Z₁ × Resource Rents interaction on CA/GDP. PanelGLS with country and year FE.

## Main Results

| Model | N | R² | Z₁ | Z₁ × Resource | Resource Rents |
|:------|--:|---:|---:|---------------:|---------------:|
| M1: Baseline | 4399 | 0.1456 | 7.043 | — | — |
| M2: + Resource Rents | 4384 | 0.1297 | 19.374 | — | 0.272*** |
| M3: + Z₁ × Resource Rents | 4384 | 0.1351 | 16.062 | — | 0.616*** |
| M4: Commodity Dummy + Z₁ × Commodity | 4399 | 0.1526 | 10.082 | — | 3.471** |
| M5: High Resource + Z₁ × High Resource | 4399 | 0.1523 | 10.236 | 0.2573 | 1.997** |
| M6: Low Resource (<5%) | 2748 | 0.1093 | -5.645 | — | — |
| M7: High Resource (≥5%) | 1636 | 0.2332 | 15.312 | — | — |
| M8: Non-Commodity (<10%) | 3336 | 0.1029 | 2.296 | — | — |
| M9: Commodity Exporters (≥10%) | 1048 | 0.2803 | 20.810 | — | — |
| M: Z₁ × oil_rents_gdp | 4366 | 0.1280 | 20.922 | — | — |
| M: Z₁ × gas_rents_gdp | 4360 | 0.1785 | 4.737 | — | — |
| M: Z₁ × mineral_rents_gdp | 4388 | 0.1504 | 5.422 | — | — |

## Residual Analysis

| Resource Quartile | Mean Residual | Std Residual | Mean Rents (%) | N |
|:-----------------|-------------:|------------:|---------------:|--:|
| Q1 (low) | 0.537 | 8.742 | 0.1 | 1096 |
| Q2 | 1.047 | 7.312 | 1.3 | 1096 |
| Q3 | 1.205 | 8.396 | 5.2 | 1096 |
| Q4 (high) | 2.484 | 12.953 | 22.0 | 1096 |

Country-level correlation (resource rents ↔ CA residual): r=0.088, p=0.2671

*PanelGLS with country and year fixed effects. Standard controls: fiscal_bal_gdp, nfa_gdp_lag, rgdp_growth, log_rel_opw, kaopen.*